John m



" VUNITED STATES APATENT OFFICE.

,v .T all whom it may concern:

JOHN M. OHARNOOK, OE BOSTON, MASSACHUSETTS, ASSIGNOR To HERSEY Y EROTHERS'OF SAME PLACE.

l SPEC'IIIC `ATIONforrni11-g` part of Letters Patent No. 423,670, dated March 18, 1890.

' Application tied Navembe'r 2o, 188s. sein no. 291,324. (No modem Be it known that I, JOHN M. OHARNOOK, of

Boston, in the county of Suffolk and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in Driers for Drying Sugar, Grain, Meal, and other Materials, of which the following is-'a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature. V Y

My invention relates to that class of driers comprising an inclined rotary drum or cyhnder having internal lifting shelves or flanges and a central internal heat-distributing pipe or conductor, the invention consisting in the constructions and combinations, as hereinafter indicated by the claims.

In the drawings, Figure l is a View, principally in side elevation, of a machine embodying the features of my invention, a portion ofk the casing of the different parts being broken out to better illustrate the construction. Fig. 2 is a cross-section of the heat-conductor or vdistributing-pipe, and Fig. 3 is a sectional Vbuckets ct. It is mounted upon the trucks or rollers ct' Ca2. The trucks a2, being somewhat higher than the trucks Ct', cause the drum to be somewhat inclined from its upper or receiving end a3 to its lower or discharging end a4. The drum has suitable bearing rings o r sections ct5 d6, to bear, respectively, upon the rolls of the trucks c and d2. It also has the gear al, with which a pinion as upon the shaft ct meshes, and by which it is slowly rotated. There is arranged in the drum A the cylindrical distributing conductor or pipe B, which is preferably supported centrally Within the drum by rings b at each end and stay-rods h. (See Fig. l.) The lower end b2 of this cylindrical conductor enters the endyo of a supply-pipe B. This pipe I3 extends from a blowing or supply fan or apparatus and enters the lower head of the drum, the drum turning about it, and is enlarged, as represented at Fig. l, and shaped to receive the lower end b2 of the cylindrical conductor and distributer B. Preferably the end b2 is enough less in diameter than the section b3 of the'end of the conducting-pipe as to provide a narrow passage or outlet b4, through which air fed into the drum by the pipe B may escape. The cylindrical conductor B has at different points in its length openings b5, which, preferably, are covered by bonnets o6, preferably opening toward the upper end of the drum, (see Fig. 1,) and the upper end o7 of the drum preferably is closed. By this construction the air, heated or otherwise treated, forced into the drum is caused to be distributed through such length or portions of the drum as may be desired.v In the drawings I have represented it as distributed at the points b4 and b5. This construction is especially valuable in drums used for driers-that is, drums employing heated air for heating the interior conductorin that the conductor is not only heated by the heated air 4which passes through it and the contents of the drums thereby dried by falling upon it and by the heat which it radiates in the drum, but there is a direct discharge -of the heating medium into the drum at different points throughout the length of the' drum, so that the material being dried is subjected to the direct action of the heated air upon it while it is in motion in the drum. To maintain and increase the circulation of the air thus introduced into the drum, I employ an exhausting apparatus for exhausting the air from the drum. This apparatus C is represented in Fig. l as attached directly to the upper end of the, drum, and it comprises an exhaust-fan, there being an opening through the upper head of the drum from the drumchamber to the fan. The material to be dried is fed to the drum through a feed-chute D, opening into the upper end of the drum, (shown in side elevation in Fig. 1,) and the material is discharged through an opening (not shown) in the lower head of the drum.

The apparatus herein described is adapted for a variety of purposes. It may be used as a drier, in which oase heated air is caused to be fed into the drum and exhausted there- TOO from, as above specified; or as a cleaner or duster, in which air, either cool or at atmospherlc temperature or heated, may be employed; or as a cooler, in which case cool air- In Fig. 3 I have represented the escapeopenings in the conductor as facing the upper en d of the drum rather than the lower end, and for some purposes this construction is desirable. I would say, however, thatthe escape-openings may face the lower end of the drum instead of the upper without chan ging the spirit ofthe invention.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United Statesl. The combination, with the inclined rotary drum or cylinder A, having internal lifting buckets or shelves, of the air-conductor B, havingair-distributing openings b5 at different points in its4 length, and the bonnets 66, shielding said openings and facing toward the upper end of said drum or cylinder.

2. The combination, with the inclined drum or rotary cylinder A, of the longitudinallycorrugated rotary air-conductor B, having l air-distributing openings b5, and the bonnets b, shielding said openings and facing lengthwise of said conductor orin line with the ridges of its corrugations.

3. The combination, with the inclinedro'- tary drum or cylinder A, of the longitudinallycorrugated air-conductorB, connected with said drum or cylinder to rotate therewith, and having covered orl shielded air-distributing openings at different points in its length, said openings facing or opening lengthwise of said conductor or in line rugations.

l JOHN M. CHARNOGK. Witnesses: f

A. T. COMPsoN,

C. A. WHITE.

with the ridges of its cor- 

